XPost: comp.arch.embedded, sci.electronics.design   
   From: rick.jones2@hp.com   
      
   In comp.protocols.tcp-ip JosephKK  wrote:   
   > First off the TCP/IP stack is 4 levels, and the ISO model is 7   
   > layers.  Thus there is intrinsic mismatch.  Much of the TCP/IP model   
   > tools span two or more layers in the ISO model.  The real deal for   
   > TCP/IP protocol definitions comes from the IETF RFC library.   
      
   The ISO and the IETF are both wrong.  There are nine layers :)   
      
   https://www.isc.org/files/9layer.thumb.png   
      
   rick jones   
   --   
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